<template>
  <view class="tui-upload__container">
    <view class="tui-upload-box">
      <view
        v-for="(item,index) in imageList" :key="index"
        class="tui-image-item" :style="{width:width+'rpx',height:height+'rpx'}"
      >
        <image
          :src="item" class="tui-item-img" :style="{width:width+'rpx',height:height+'rpx'}"
          mode="aspectFill" @tap.stop="previewImage(index)"
        />
        <view v-if="!forbidDel" class="tui-img-del" @tap.stop="delImage(index)" />
        <view v-if="statusArr[index]!=1" class="tui-upload-mask">
          <view v-if="statusArr[index]==2" class="tui-upload-loading" />
          <text class="tui-tips">{{ statusArr[index]==2?'上传中...':'上传失败' }}</text>
          <view
            v-if="statusArr[index]==3" class="tui-mask-btn" hover-class="tui-btn-hover"
            :hover-stay-time="150" @tap.stop="reUpLoad(index)"
          >
            重新上传
          </view>
        </view>
      </view>
      <view
        v-if="isShowAdd" class="tui-upload-add" :style="{width:width+'rpx',height:height+'rpx'}"
        @tap="chooseImage"
      >
        <view class="tui-upload-icon tui-icon-plus" />
      </view>
    </view>
  </view>
</template>

<script>
export default {
  name: 'TuiUpload',
  props: {
    //展示图片宽度
    width: {
      type: [Number, String],
      default: 220
    },
    //展示图片高度
    height: {
      type: [Number, String],
      default: 220
    },
    //初始化图片路径
    value: {
      type: Array,
      default () {
        return []
      }
    },
    //删除图片前是否弹框确认
    delConfirm: {
      type: Boolean,
      default: false
    },
    //禁用删除
    forbidDel: {
      type: Boolean,
      default: false
    },
    //禁用添加
    forbidAdd: {
      type: Boolean,
      default: false
    },
    //服务器接口地址。当接口地址为空时，直接返回本地图片地址
    serverUrl: {
      type: String,
      default: ''
    },
    //限制数
    limit: {
      type: Number,
      default: 9
    },
    //original 原图，compressed 压缩图，默认二者都有
    sizeType: {
      type: Array,
      default () {
        return ['original', 'compressed']
      }
    },
    //album 从相册选图，camera 使用相机，默认二者都有。如需直接开相机或直接选相册，请只使用一个选项
    sourceType: {
      type: Array,
      default () {
        return ['album', 'camera']
      }
    },
    //可上传图片类型，默认为空，不限制  Array<String> ['jpg','png','gif']
    imageFormat: {
      type: Array,
      default () {
        return []
      }
    },
    //单张图片大小限制 MB 
    size: {
      type: Number,
      default: 4
    },
    //文件对应的key，默认为 file
    fileKeyName: {
      type: String,
      default: 'file'
    },
    //HTTP 请求 Header, header 中不能设置 Referer。
    header: {
      type: Object,
      default () {
        return {}
      }
    },
    //HTTP 请求中其他额外的 form data
    formData: {
      type: Object,
      default () {
        return {}
      }
    },
    //自定义参数
    params: {
      type: [Number, String],
      default: 0
    }
  },
  emits: ['remove', 'complete'],
  data() {
    return {
      //图片地址
      imageList: [],
      //上传状态：1-上传成功 2-上传中 3-上传失败
      statusArr: []
    }
  },
  computed: {
    isShowAdd() {
      let isShow = true
      if (this.forbidAdd || (this.limit && this.imageList.length >= this.limit)) {
        isShow = false
      }
      return isShow
    }
  },
  watch: {
    value(val) {
      if (val) {
        this.initImages()
      }
    }
  },
  created() {
    this.initImages()
  },
  methods: {
    initImages() {
      this.statusArr = []
      this.imageList = [...this.value]
      for (let item of this.imageList) {
        this.statusArr.push('1')
      }
    },
    clearFiles() {
      this.imageList = []
      this.statusArr = []
    },
    // 重新上传
    reUpLoad(index) {
      this.$set(this.statusArr, index, '2')
      this.change()
      this.uploadImage(index, this.imageList[index]).then(() => {
        this.change()
      }).catch(() => {
        this.change()
      })
    },
    /**
			 * @param manual 是否手动上传
			 **/
    change(manual = false) {
      let status = ~this.statusArr.indexOf('2') ? 2 : 1
      if (status != 2 && ~this.statusArr.indexOf('3')) {
        // 上传失败
        status = 3
      }
      this.$emit('complete', {
        status: status,
        imgArr: this.imageList,
        params: this.params,
        manual: manual
      })
    },
    toast(text) {
      text && uni.showToast({
        title: text,
        icon: 'none'
      })
    },
    chooseImage: function() {
      let _this = this
      uni.chooseImage({
        count: _this.limit - _this.imageList.length,
        sizeType: _this.sizeType,
        sourceType: _this.sourceType,
        success: function(e) {
          let imageArr = []
          for (let i = 0; i < e.tempFiles.length; i++) {
            let len = _this.imageList.length
            if (len >= _this.limit) {
              _this.toast(`最多可上传${_this.limit}张图片`)
              break
            }
            //过滤图片类型
            let path = e.tempFiles[i].path

            if (_this.imageFormat.length > 0) {
              let format = ''
              // #ifdef H5
              let type = e.tempFiles[i].type
              format = type.split('/')[1]
              // #endif

              // #ifndef H5
              format = path.split('.')[(path.split('.')).length - 1]
              // #endif

              if (_this.imageFormat.indexOf(format) == -1) {
                let text = `只能上传 ${_this.imageFormat.join(',')} 格式图片！`
                _this.toast(text)
                continue
              }
            }

            //过滤超出大小限制图片
            let size = e.tempFiles[i].size

            if (_this.size * 1024 * 1024 < size) {
              let err = `单张图片大小不能超过：${_this.size}MB`
              _this.toast(err)
              continue
            }
            imageArr.push(path)
            _this.imageList.push(path)
            _this.statusArr.push('2')
          }
          _this.change()

          let start = _this.imageList.length - imageArr.length
          for (let j = 0; j < imageArr.length; j++) {
            let index = start + j
            //服务器地址
            if (_this.serverUrl) {
              _this.uploadImage(index, imageArr[j]).then(() => {
                _this.change()
              }).catch(() => {
                _this.change()
              })
            } else {
              //无服务器地址则直接返回成功
              _this.$set(_this.statusArr, index, '1')
              _this.change()
            }
          }
        }
      })
    },
    uploadImage: function(index, url, serverUrl) {
      let _this = this
      return new Promise((resolve, reject) => {
        uni.uploadFile({
          url: this.serverUrl || serverUrl,
          name: this.fileKeyName,
          header: this.header,
          formData: this.formData,
          filePath: url,
          success: function(res) {
            if (res.statusCode == 200) {
              //返回结果 此处需要按接口实际返回进行修改
              let d = JSON.parse(res.data.replace(/\ufeff/g, '') || '{}')
              //判断code，以实际接口规范判断
              if (d.code % 100 === 0) {
                // 上传成功 d.url 为上传后图片地址，以实际接口返回为准
                d.result.url && (_this.imageList[index] = d.result.url)
                _this.$set(_this.statusArr, index, d.result.url ? '1' : '3')
              } else {
                // 上传失败
                _this.$set(_this.statusArr, index, '3')
              }
              resolve(index)
            } else {
              _this.$set(_this.statusArr, index, '3')
              reject(index)
            }
          },
          fail: function(res) {
            _this.$set(_this.statusArr, index, '3')
            reject(index)
          }
        })
      })

    },
    delImage: function(index) {
      let that = this
      if (this.delConfirm) {
        uni.showModal({
          title: '提示',
          content: '确认删除该图片吗？',
          showCancel: true,
          cancelColor: '#555',
          confirmColor: '#eb0909',
          confirmText: '确定',
          success(res) {
            if (res.confirm) {
              that.imageList.splice(index, 1)
              that.statusArr.splice(index, 1)
              that.$emit('remove', {
                index: index,
                params: that.params
              })
              that.change()
            }
          }
        })
      } else {
        that.imageList.splice(index, 1)
        that.statusArr.splice(index, 1)
        that.$emit('remove', {
          index: index,
          params: that.params
        })
        that.change()
      }
    },
    previewImage: function(index) {
      if (!this.imageList.length) return
      uni.previewImage({
        current: this.imageList[index],
        loop: true,
        urls: this.imageList
      })
    },
    /**
			 * 当属性serverUrl传空时，父级调用该方法一次性上传所有图片
			 * @param serverUrl 服务器接口地址
			 **/
    uploadAllImage(serverUrl) {
      if (!serverUrl) {
        this.toast('服务器接口地址不能为空！')
        return
      }
      let imageArr = [...this.imageList]
      const len = imageArr.length
      for (let i = 0; i < len; i++) {
        //如果是服务器地址图片则无需再次上传
        if (imageArr[i].startsWith('https')) {
          continue
        } else {
          this.$set(this.statusArr, i, '2')
          this.uploadImage(i, imageArr[i], serverUrl).then(() => {
            if (i === len - 1) {
              this.change(true)
            }
          }).catch(() => {
            if (i === len - 1) {
              this.change(true)
            }
          })
        }
      }
    }
  }
}
</script>

<style scoped>
	@font-face {
		font-family: 'tuiUpload';
		src: url(data:application/font-woff;charset=utf-8;base64,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) format('woff');
		font-weight: normal;
		font-style: normal;
	}

	.tui-upload-icon {
		font-family: "tuiUpload" !important;
		font-style: normal;
		-webkit-font-smoothing: antialiased;
		-moz-osx-font-smoothing: grayscale;
		padding: 10rpx;
	}

	.tui-icon-delete:before {
		content: "\e601";
	}

	.tui-icon-plus:before {
		content: "\e609";
	}

	.tui-upload-box {
		width: 100%;
		display: flex;
		flex-wrap: wrap;
	}

	.tui-upload-add {
		font-size: 68rpx;
		font-weight: 100;
		color: #888;
		background-color: #F7F7F7;
		display: flex;
		align-items: center;
		justify-content: center;
		padding: 0;
	}

	.tui-image-item {
		position: relative;
		margin-right: 20rpx;
		margin-bottom: 20rpx;
	}

	.tui-image-item:nth-of-type(3n) {
		margin-right: 0;
	}

	.tui-item-img {
		display: block;
	}

	.tui-img-del {
		width: 36rpx;
		height: 36rpx;
		position: absolute;
		right: -12rpx;
		top: -12rpx;
		background-color: #EB0909;
		border-radius: 50%;
		color: white;
		font-size: 34rpx;
		z-index: 200;
	}

	.tui-img-del::before {
		content: '';
		width: 16rpx;
		height: 1px;
		position: absolute;
		left: 10rpx;
		top: 18rpx;
		background-color: #fff;
	}

	.tui-upload-mask {
		width: 100%;
		height: 100%;
		position: absolute;
		left: 0;
		top: 0;
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		padding: 40rpx 0;
		box-sizing: border-box;
		background-color: rgba(0, 0, 0, 0.6);
	}

	.tui-upload-loading {
		width: 28rpx;
		height: 28rpx;
		border-radius: 50%;
		border: 2px solid;
		border-color: #B2B2B2 #B2B2B2 #B2B2B2 #fff;
		animation: tui-rotate 0.7s linear infinite;
	}

	@keyframes tui-rotate {
		0% {
			transform: rotate(0);
		}

		100% {
			transform: rotate(360deg);
		}
	}

	.tui-tips {
		font-size: 26rpx;
		color: #fff;
	}

	.tui-mask-btn {
		padding: 4rpx 16rpx;
		border-radius: 40rpx;
		text-align: center;
		font-size: 24rpx;
		color: #fff;
		border: 1px solid #fff;
		display: flex;
		align-items: center;
		justify-content: center;
		flex-shrink: 0;
		margin-top: 26rpx;
	}

	.tui-btn-hover {
		opacity: 0.8;
	}
</style>
